A thorough inspection will be conducted today to determine how many thousands of dollars in damage was caused by Dover High School seniors at rival New Philadelphia High School and Welty Middle School early Friday.

New Philadelphia police also continue to investigate. Police responded to a call at 2:07 a.m. that two youths were throwing toilet paper around the high school. Police were unable to locate them.

Police Capt. Shawn Nelson later learned that the incident involved a dozen Dover High School seniors who had been at a senior overnight party.

The damage involves a special, tinted window film that was installed in the past week to increase safety in the high school and middle school, New Philadelphia schools Superintendent Bob Alsept said.

“You can see out of the classroom, but you can’t see in from the outside,” he said.

The preliminary damage estimate is about $18,000.

“They seemed to target the windows that had the Quaker image, the New Philadelphia logo or the district’s core values printed on them,” Alsept said.

Among the images and words imprinted on the windows are “Responsibility,” “Respect,” “Accountability” and “Honesty.”

Kelly Ricklic, district building and grounds supervisor, said vandals painted 13 doorways, or about 28 individual doors, and dozens of windows, all on the ground level.

“Most of it was on the high school, there were only about four doorways and four windows on the middle school,” he said.

Ricklic said that tubes of poster paint were used, not spray paint as initially indicated. Some of the tubes were left at the scene.

The vandals also put what appeared to be petroleum jelly on door handles. “That damaged the entrance scanners and intercom system,” Ricklic said.

Crews also cleared away toilet paper thrown around the building.

Based on preliminary inspection, it appeared that no paint was applied to the bricks of the building.

Five school employees began cleaning at about 2:30 a.m. and continued through 6:30 a.m., Ricklic said.

Some faint images, or scratches, remain that show the Dover High School script D or other vandalism.

“There were a lot of offensive words and drawings,” Ricklic said of the graffiti.

Alsept said it didn’t disrupt classes because school personnel worked intensely to clean up the mess prior to students arriving.